Question

Rohit kept a sample of a white powder in a china dish under sunlight. After some time, he found that the white powder had turned grey. Answer the following questions: a. Identify the white and grey powders. b. What type of reaction is this? c. Write the balanced chemical equation for the above reaction. identify the brown fume

Answer 1

Hey mate! Here is ur answer along with analysis...

According to the question,

white powder➡️ grey powder(in the presence of sunlight)

a)The white powder is silver chloride. The grey powder is silver.

b) It's a photolytic decomposition reaction. (photolytic because it's broken down with the help of light energy)

c) Balanced chemical equation:

2AgCl ➡️ 2Ag + Cl

(write sunlight above the arrow)

Dude... Brown fumes aren't observed in this reaction. it's seen when lead nitrate decomposes into lead oxide, nitrogen dioxide and oxygen. In that case, Nitrogen dioxide is the brown fumes.

In this reaction we can see that chlorine gas is liberated. Except change in colors, no other observations are found.

Hope this helps u...

Regards

@Pavana karanth.

Answer 2

hi!

1. silver chloride turns grey in sunlight to form silver metal

2. it helps in decomposition to form Cl[gas] & Ag{metal} which is grey in color. 

3. 2AgCl(s)in presence of sunlight = 2Ag(s) +Cl2

4. Photolitic decomposition reaction